Your Daily Sudoku Streak
A fresh challenge every day — solve it, keep your streak alive and climb the leaderboard. Classic, Killer, X-Sudoku, Samurai and more — free in your browser.
Every puzzle has a single solution — always solvable by pure logic, never guessing.
Solved by our community so far
Ways to play
From the timeless classic to overlapping Samurai grids. Learn the rules, then jump straight in.
Classic Sudoku
The original 9×9 puzzle — fill every row, column and 3×3 box with the digits 1–9.
Rules & playKiller Sudoku
Sudoku meets arithmetic — dotted cages must add up to their target sum, no repeats.
Rules & playX-Sudoku
All classic rules plus the two main diagonals must also contain 1–9.
Rules & playCenter Dot Sudoku
Classic plus one extra region: the nine box centres must also hold 1–9.
Rules & playGerman Whispers Sudoku
A green line runs across the grid — touching digits along it must differ by at least 5.
Rules & playDutch Whispers Sudoku
The gentler whisper: digits touching along the line must differ by at least 4.
Rules & playNabner Sudoku
A line where every pair of digits is at least two apart — the opposite of a Renban run.
Rules & playSamurai Sudoku
Five overlapping 9×9 grids in a cross — one big connected challenge.
Rules & playMade for daily play
Track your progress, compete and play your way — on any device.
Daily challenges
A fresh Easy, Medium and Hard puzzle every day — everyone plays the same, compare your times.
Streaks
Play each day to grow your streak. The app tracks your current and longest run.
Leaderboards
Climb the global rankings by Sparks, longest streak or games completed.
Achievements
Unlock badges for milestones, perfect games, fast solves and mastering every variant.
Printable PDFs
Download free printable Sudoku packs for any type and difficulty — solve on paper.
Any device
No install required. Works in any modern browser on phone, tablet and desktop.
Play Sudoku online — free, in your browser
SudokuStreak is a free online Sudoku game you can play instantly in your browser — no download required. Pick your difficulty from Easy to Evil, choose Classic or a variant, and start solving. Every puzzle is generated to have exactly one unique solution that can always be reached with logic alone, so you never have to guess. Create a free account to save your progress, keep your streak across devices and join the leaderboard.
New to Sudoku, or want to get faster? The Sudoku School walks you through the rules and solving techniques — naked and hidden singles, pointing pairs, X-Wing and more — with interactive examples. Prefer pen and paper? Generate free printable PDF puzzles for any type and difficulty.
Come back every day for the daily challenge, build a streak, and see how you rank on the leaderboard. Have a question? Check the FAQ.
Play free — get more with an account
You can play everything without signing up. A free account just keeps your game going:
- Save your progress and pick up on any device
- Keep your daily streak alive
- Claim your spot on the leaderboard under your name
- Earn and keep coins, achievements and jokers
Frequently asked questions
Is SudokuStreak free?
Yes — every puzzle, every variant and the daily challenge are completely free, with no account required. A free account simply saves your progress and puts you on the leaderboard.
Do I need to download an app?
No. SudokuStreak runs in any modern web browser on phone, tablet or desktop — there is nothing to install.
Which Sudoku variants can I play?
Classic, Killer, X-Sudoku, Samurai and more, each in five difficulties from Easy to Evil.
Do the puzzles always have a unique solution?
Yes. Every puzzle is generated with exactly one solution that can be reached by logic alone — you never have to guess.
What is the daily challenge?
A fresh Easy, Medium and Hard puzzle every day. Everyone plays the same puzzles, so you can compare your times and build a daily streak.
Can I print Sudoku puzzles?
Yes — you can generate free printable PDF puzzles for any type and difficulty and solve them on paper.
More questions? Read the full FAQ.
Pick a puzzle and play
Choose a type and difficulty — your next puzzle is one click away.
Play free Sudoku